Berlin 2024 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 22: Focus Session: Young Semiconductor Forum
HL 22.5: Poster
Dienstag, 19. März 2024, 11:00–15:30, Poster F
Doping-control of excitons and magnetism in few-layer CrSBr — •Farsane Tabataba-Vakili1,2, Huy Nguyen1, Anna Rupp1, Kseniia Mosina3, Anastasios Papavasileiou3, Patrick Maletinsky4, Mikhail Glazov5, Zdenek Sofer3, Anvar Baimuratov1, and Alexander Högele1,2 — 1Fakultät für Physik, Munich Quantum Center, and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, München, Germany — 2Munich Center for Quantum Science and Technology (MCQST), München, Germany — 3Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Prague, Czech Republic — 4Department of Physics, University of Basel, Basel, Switzerland — 5Saint Petersburg, Russia
In 2D magnets, phenomena distinct from bulk magnetism have been revealed, such as sensitivity to charge doping and electric field in few-layer CrI3. Air-stable CrSBr stands out as an antiferromagnetic semiconductor with excitons coupled to the magnetic order and exciton-magnon coupling. I will present our work on doping-control of excitons and magnetism in few-layer CrSBr. We demonstrate that both exciton and magnetic transitions are sensitive to field-effect charging, exhibiting bound exciton-charge complexes and doping-induced metamagnetic transitions. We further visualize magnetic domain formation induced by magnetic field or charge-doping at the metamagnetic transition all-optically by raster-scan reflectance imaging. Our work identifies few-layer CrSBr as a rich platform for exploring collaborative effects of charge, optical excitations, and magnetism.
Keywords: 2D semiconductors; 2D magnets; CrSBr; excitons